<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/ome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <!-- 警告 -->
      <el-alert
        title="注意：只允许第三季分类设置相关参数"
        type="warning"
        show-icon
        :closable="false"
      >
      </el-alert>

      <!-- 选择商品 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            v-model="selectedCateKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>

      <!-- Tab 页签 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBenDisabled"
            @click="addDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态表格 -->
          <el-table :data="manyTableDate" border stripe>
            <!-- 展示列 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handkeClose(i, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"> </el-table-column>
            <el-table-column label="参数名称" prop="attr_name">
            </el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="warning"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBenDisabled"
            @click="addDialogVisible = true"
            >添加属性</el-button
          >
          <!-- 静态表格 -->
          <el-table :data="onlyTableDate" border stripe>
            <!-- 展示列 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handkeClose(i, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"> </el-table-column>
            <el-table-column label="参数名称" prop="attr_name">
            </el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="warning"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>

      <!-- 添加对话框 -->
      <el-dialog
        :title="'添加' + titleText"
        :visible.sync="addDialogVisible"
        width="30%"
        @close="addDoalogClosed"
      >
        <el-form
          :model="addForm"
          :rules="addFormRules"
          ref="addFormRef"
          label-width="100px"
        >
          <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 修改的对话框 -->
      <el-dialog
        :title="'添加' + titleText"
        :visible.sync="editDialogVisible"
        width="30%"
        @close="editDialogClosed"
      >
        <el-form
          :model="editForm"
          :rules="editFormRules"
          ref="editFormRef"
          label-width="100px"
        >
          <el-form-item :label="titleText" prop="attr_name">
            <el-input v-model="editForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>
<script>
export default {
  data() {
    return {
      cateList: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 级联选择框双向绑定的数组
      selectedCateKeys: [],
      // 被激活的页签的名称
      activeName: 'many',
      // 动态参数数据
      manyTableDate: [],
      // 静态参数数据
      onlyTableDate: [],
      // 添加对话框显示隐藏
      addDialogVisible: false,
      // 添加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      // 表单的验证规则对象
      addFormRules: {
        attr_name: [
          {
            required: true,
            message: '请输入参数名称！',
            trigger: 'blur'
          }
        ]
      },
      editDialogVisible: false,
      editForm: {},
      // 表单的验证规则对象
      editFormRules: {
        attr_name: [
          {
            required: true,
            message: '请输入参数名称！',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  created() {
    // 获取所有商品分类列表
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败！')
      }

      this.cateList = res.data
      // console.log(this.cateList)
    },
    // 级联选择框发生变化触发
    handleChange() {
      this.getParamsData()
    },
    // Tab 页签点击事件的处理函数
    handleTabClick() {
      // console.log(this.activeName)
      this.getParamsData()
    },
    // 获取参数列表数据
    async getParamsData() {
      // 证明不是选择的三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableDate = []
        this.onlyTableDate = []
        return
      }

      // 根据所选分类的Id，和当前所处的面板，获取对应的参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}}/attributes`,
        {
          params: {
            sel: this.activeName
          }
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败!')
      }
      // console.log(res.data)

      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      })
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableDate = res.data
      } else {
        this.onlyTableDate = res.data
      }
    },
    addDoalogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          }
        )
        console.log(res.meta.status)
        if (res.meta.status !== 201) return this.$message.error('添加参数失败')

        this.$message.success('添加参数成功！')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 修改的对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${id}`,
        {
          params: {
            attr_sel: this.activeName
          }
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取当前id的参数失败！')
      }

      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 重置修改的表单的原始数据
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 修改参数信息
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('当前id的参数修改失败')
        }

        this.$message.success('修改成功')
        this.editDialogVisible = false
        this.getParamsData()
      })
    },
    async removeParams(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该参数, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch((err) => err)

      // 删除逻辑
      if (confirmResult !== 'confirm') return this.$message.info('取消删除')

      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${id}`
      )
      if (res.meta.status !== 200) return this.$message.error('删除失败')
      this.$message.success('删除参数成功')
      this.getParamsData()
    },
    showInput(row) {
      row.inputVisible = true
      // 让文本框自动获得焦点
      // $nextTick方法的作用，就是当页面上元素被重新渲染之后，才会指定回调函数中的代码
      this.$nextTick((_) => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      // 如果没有return，则证明输入的内容，需要做后续处理
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    async saveAttrVals(row) {
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' ')
        }
      )

      if (res.meta.status !== 200) return this.$message.error('修改参数失败')

      this.$message.success('修改参数成功')
    },
    // 关闭标签页的索引
    handkeClose(i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    // 如果按钮需要被禁用，则返回true，否则返回false
    isBenDisabled() {
      if (this.selectedCateKeys.length !== 3) return true
      return false
    },
    // 当前选中的三级分类的Id
    cateId() {
      if (this.selectedCateKeys.length === 3) return this.selectedCateKeys[2]
      return null

      // return this.selectedCateKeys.length === 3
      //   ? this.selectedCateKeys[2]
      //   : null
    },
    // 动态计算标题的文本
    titleText() {
      if (this.activeName === 'many') return '动态参数'
      return '静态属性 '
    }
  }
}
</script>
<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 10px 20px;
}
.el-input,
.el-button {
  width: 150px;
  margin-left: 20px;
}
</style>
